Friction coupling



April 29, 1941.

R. BINDER FRICTION COUPLING Filed' April 15, 1938 INVENTOR Kic/mrdfiinder ATTORNEYS m nta Apr. 29,1941 I ol-"r cs FBICTION-GOUPIJNG Richard Binder, Schweinfurt, Germany Application April 15, 1938, Serial No.

In Germany May 5, 1937 3Claims.

The present invention relates to friction couplings, provided with disc-like coupling members one of which consists of one or more discs having a lining or covering of friction material, whereas the other consists of a casing in which I a movable pressing disc rotating with the casing is arranged. The two coupling members are, in a well known manner, pressed together by releasable springs and levers which under the action of the centrifugal force exert an additional coupling pressure upon both members.

The friction coupling according to the invention differs from known devices of this kind by the fact, that the harmful effect of the resiliency of the casing is, in a suitable manner, removed or rendered useful for pressing together the coupling members.

is disposed on opposite sides of the clutch disc.

. The'pressure disc '3 and the fly wheel are urged force or a portion of same, 'an alteration of the length of adjustment of the coupling due to the resiliency of the casing and other parts also which are subjected to this pressing force is caused by the increase of pressure occurring with increasing speed of revolution. This alteration sometimes is such as to consume the safety clearance available between the thrust bearing and the coupling levers, so that slipping ofv the coupling and thereby an increased wear of the covering or lining of the coupling members as well as of the throw-out bearing results.

According to the present invention this alteration is partially or totally removed byarranging counter-weights at the casing of the coupling in such' a manner, that the centrifugal forces due to these weights counter-act a deformation of the casing. 1 v In'the accompanying drawing two constructions of couplings according to the invention are shown by way of example.

In this drawing: Fig. 1 shows an axial section through a coupling according to the invention,

closing an axially movable pressure disc I. Theother coupling-member is the usual clutch disc mounted on a shaft for rotationtherewith and into coupling engagement with opposite surf of the clutch disc by springs i4.

In order to disengage the coupling, shifter levers ii are provided, pivotally connected to the disc 3, and having fulcrum connections to one end of the rods l5 respectively, the other ends ofsaid rods being anchored to the wall In of thecoupling member 5.

"Centrifugal weights i are provided forthe purpose of increasing the surface coupling pressure between the members 3 and I and the clutch disc with increasing speed of rotation. These weights l are connected to the radially outer ends of levers 4 respectively.- Each of these levers Q is pivotally connected to a small block I, fixed to the innerside of the casing wall 8a., and transmits pressure upon the pressing disc I by means of a pin or bolt l I movably arranged in the longitudinal slot III of said lever. As the coupling'is rotated, each centrifugal weight I is rotated counter-clockwise (Fig. 1') about its pivotal support on the block 9 by centrifugal action, to urge the two members 3 and I into firmer coupling engagement with the intervening clutch disc, me

, as the speed of rotation increases the coupling -force resulting from the action of the centrifugal these members produce a moment about the point 8. This moment exerts a force upon the casing positioned between said'fly wheel and said pressure disc. Suitable friction facing material It! I in a direction opposite to that of the arrow D, and counter-balances the forces acting upon the endwallia ofthecasingiinthedirectionDJo that harmful deformation of said casing is prevented.

What I claim is:

1. In a friction'coupling of'the class wherein there is provided a pair of coupling elements.

one of which includes a casing having a portion substantially perpendicular to the axis of the coupling. and springs for moving said elements into surface coupling relationship, the combination therewith of pivotally supported centrifugal weights operable by centrifugal force to increase the surface coupling pressure between said ele-' ments, and exerting outward axial forces on said casing and prevent substantial in said setting length, and including weights pivotdly suspended from the inner side or said caainz. and acting by centrifugal force to produce said componcnt forces against said 2. In a friction coupling of the class wherein there in provieicd a pair of ccuplinz elements, one or which includes a casing having: a aecticn substantially mrpcndtmficr to the axis of the coupling, amt .spflaga tor moving acid elements into surface coupling relation, in comm tton therewith or" centrifugal weights operable by centrifugal force to increase the surface ccumlm measure hctween said elements, but exerting at thc'samc time axial fumec on acid tending to ticicrm cam cmcimg anti mama setting length. of email comm t, was? mcludinz said centritunl intents. and can: un-

der centrimzai action for creating forces having.

components acting in opposition to said axial forces, to 'prevent harmtul deformation at said caainz, and prevent substantial changes in said ccttins length.

3. In a iriction'couplinz oi the class wherein there is provided a pair of coupling elementa, one

'ccrm to inc (mac tho mmfacc cumming mccame imctwe'em cam clcmmtfl and at the same time mevent c'fizti mm iii-mm m? eating i*ccult- 1 mm 13mm cam}. Emmet Y 

